Multiple vulnerabilities in Discourse



Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2023-37904
CVE-2023-38684
CVE-2023-37467
CVE-2023-38498
CVE-2023-37906
CWE-ID CWE-362
CWE-770
CWE-323
CWE-400
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Discourse
Web applications / Forum & blogging software

Vendor Civilized Discourse Construction Kit, Inc.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Race condition

EUVDB-ID: #VU78758

Risk: Low

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-37904

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a race condition in Accept Invite. A remote user can exploit the race and create more users than permitted from invite links.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.0.5 - 3.1.0 beta6

CPE2.3 External links

http://github.com/discourse/discourse/commit/62a609ea2d0645a27ee8adbb01ce10a5e03a600b
http://github.com/discourse/discourse/security/advisories/GHSA-6wj5-4ph2-c7qg


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU78770

Risk: Medium

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-38684

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to unbounded limits in various controller actions. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.0.5 - 3.1.0 beta6

CPE2.3 External links

http://github.com/discourse/discourse/security/advisories/GHSA-ff7g-xv79-hgmf
http://github.com/discourse/discourse/commit/bfc3132bb22bd5b7e86f428746b89c4d3d7f5a70


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Reusing a Nonce, Key Pair in Encryption

EUVDB-ID: #VU78763

Risk: Medium

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-37467

CWE-ID: CWE-323 - Reusing a Nonce, Key Pair in Encryption

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system. 

The vulnerability exists due to the CSP (Content Security Policy) nonce reuse issue. A remote user can bypass CSP protection. 

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.1.0 beta6

CPE2.3 External links

http://github.com/discourse/discourse/commit/0976c8fad6970b6182e7837bf87de07709407f25
http://github.com/discourse/discourse/security/advisories/GHSA-gr5h-hm62-jr3j


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Resource exhaustion

EUVDB-ID: #VU78761

Risk: Low

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-38498

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the defer queue. A remote user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.0.5 - 3.1.0 beta6

CPE2.3 External links

http://github.com/discourse/discourse/commit/26e267478d785e2f32ee7da4613e2cf4a65ff182
http://github.com/discourse/discourse/security/advisories/GHSA-wv29-rm3f-4g2j


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Input validation error

EUVDB-ID: #VU78759

Risk: Low

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-37906

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the post edit reason. A remote user can edit a post in a topic and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.0.5 - 3.1.0 beta6

CPE2.3 External links

http://github.com/discourse/discourse/security/advisories/GHSA-pjv6-47x6-mx7c
http://github.com/discourse/discourse/commit/dcc825bda505a344eda403a1b8733f30e784034a


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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